Package it.dtk.avro

Examples of it.dtk.avro.User$Builder


   * @throws IOException
   *             example using bean schema defined in it.dreamslair.avro package
   */
  public static void schemaExample() throws IOException {
   
    User user1 = new User();
    user1.setName("Alyssa");
    user1.setFavoriteNumber(256);
    // Leave favorite color null

    // Alternate constructor
    User user2 = new User("Ben", 7, "red");
    //this print the bean as it is saved in the datuwriter
    System.out.println(user1.toString());

    // Construct via builder
    User user3 = User.newBuilder().setName("Charlie")
        .setFavoriteColor("blue").setFavoriteNumber(null).build();

    // Serialize user1 and user2 to disk
    File file = new File("users.avro");
    DatumWriter<User> userDatumWriter = new SpecificDatumWriter<User>(
        User.class);
    DataFileWriter<User> dataFileWriter = new DataFileWriter<User>(
        userDatumWriter);
    dataFileWriter.create(user1.getSchema(), new File("users.avro"));
    dataFileWriter.append(user1);
    dataFileWriter.append(user2);
    dataFileWriter.append(user3);
    dataFileWriter.append(user1);
    dataFileWriter.append(user2);
    dataFileWriter.append(user3);
    dataFileWriter.append(user1);
    dataFileWriter.append(user2);
    dataFileWriter.append(user3);
    dataFileWriter.append(user1);
    dataFileWriter.append(user2);
    dataFileWriter.append(user3);
    dataFileWriter.close();

    // Deserialize Users from disk
    DatumReader<User> userDatumReader = new SpecificDatumReader<User>(
        User.class);
    DataFileReader<User> dataFileReader = new DataFileReader<User>(file,
        userDatumReader);
    User user = null;
    while (dataFileReader.hasNext()) {
      // Reuse user object by passing it to next(). This saves us from
      // allocating and garbage collecting many objects for files with
      // many items.
      user = dataFileReader.next(user);
View Full Code Here

TOP

Related Classes of it.dtk.avro.User$Builder

Copyright © 2018 www.massapicom. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.